Malicious PDF — malware analysis report

Static analysis result for SHA-256 074c695068d7239c…

MALICIOUS

PDF

84.4 KB Created: 2021-05-29 04:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c756c3684f0e9e753e4d0fa54956af6f SHA-1: 7484ad1930dcbece3bdef5c8fa0bfb87efd2b559 SHA-256: 074c695068d7239c12ce0ad5da8047f63c43ff5adef1073281681e226419922e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/strik?utm_term=list+of+children%2527s+strengths+and+weaknesses PDF link annotation
    • https://rafafokisot.weebly.com/uploads/1/3/4/7/134738004/sedogofavan_sosawovozav.pdfIn PDF document text
    • https://gixorinimomavam.weebly.com/uploads/1/3/2/6/132695995/tidegijizufe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476954/normal_5ffcc8b624ce4.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4417664/normal_60aff4a29f5fa.pdfIn PDF document text
    • https://zepaxanodufinek.weebly.com/uploads/1/3/4/4/134455649/63ae8ac01d64e40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418781/normal_6013a50b638ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_6052e0ab45c85.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4475729/normal_60aff2fe5ea3e.pdfIn PDF document text
    • https://vubedokixe.weebly.com/uploads/1/3/4/7/134716192/lajow.pdfIn PDF document text
    • https://vabemeraronoj.weebly.com/uploads/1/3/1/4/131452983/9199980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_6012502b77c0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372076/normal_60068ef704ced.pdfIn PDF document text
    • https://zopewurexolo.weebly.com/uploads/1/3/4/5/134519391/zixavuvotetowafipu.pdfIn PDF document text
    • https://pibusabet.weebly.com/uploads/1/3/4/6/134695111/2399781.pdfIn PDF document text
    • https://gamekesilib.weebly.com/uploads/1/3/4/8/134892139/9674092.pdfIn PDF document text
    • https://vuvowopivuvi.weebly.com/uploads/1/3/1/4/131410126/ketone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c29173-d1e7-4c99-a2e6-f66e497f2bae/30460825580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1795410a-7e77-4f4c-a322-4f8a9422b544/lenovo_g50-80_caddy_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca697eb7-6e61-4b22-9307-0454909a7865/diwutibola.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C54 5416 bytes
SHA-256: 689c8d50574b67960204a53c4388226160618e355a67027402a73dae4eee8f68
font_01_sfnt_off00011ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED9 11060 bytes
SHA-256: c118eded396a06c333eeac20192d276dceb3351345a59fa8515b86c4ba25b185

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